Long-Running Isolates in Flutter

The long-running Isolate is a technique that I have used now in my contracting to run extensive processes in the background of a Flutter app. Running background code came up as a need while working with a local startup FytFeed in order to power some on-device integrations. I wrote code that detected the availbility of information in HealthKit and shipped those updates off all while being separate from the main isolate to avoid any UI jank and keep the interface responsive and clean.